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United States Patent | 5,540,487 |
Beck ,   et al. | July 30, 1996 |
Following a general trend, the present invention provides an anti-locking hydraulic brake system to which a brake force controller has been added. However, as opposed to the prior state of art, the brake force controller (21) according to the invention is blocked only once the pump (18) builds up pressure. This means that in any uncritical deceleration, the brake force controller (21) performs its pressure reducing function as soon as the switch-over pressure thereof is attained. This will involve the advantage over other brake force controls actuated only upon failure of the anti-locking function that jamming or seizing of operative elements of the controller is prevented from occurring and that, in addition, a slip control will be required less frequently.
Inventors: | Beck; Erhard (Weilburg, DE); Reinartz; Hans-Dieter (Frankfurt am Main, DE); Volz; Peter (Darmstadt, DE) |
Assignee: | ITT Automotive Europe GmbH (DE) |
Appl. No.: | 373310 |
Filed: | February 16, 1995 |
PCT Filed: | July 13, 1993 |
PCT NO: | PCT/EP93/01834 |
371 Date: | February 16, 1995 |
102(e) Date: | February 16, 1995 |
PCT PUB.NO.: | WO94/02340 |
PCT PUB. Date: | February 3, 1994 |
Jul 21, 1992[DE] | 42 24 007.7 |
Current U.S. Class: | 303/116.1; 303/84.2; 303/DIG.2 |
Intern'l Class: | B60T 008/26 |
Field of Search: | 303/10.11,116.1,116.2,113.1,113.5,84.2,DIG. 1,DIG. 2,9.62,9.63 |
4898430 | Feb., 1990 | Becker-Endrigkeit et al. | 303/84. |
4969697 | Nov., 1990 | Lindenmann | 303/116. |
5209552 | May., 1993 | Reinartz et al. | 303/116. |
Foreign Patent Documents | |||
3742173 | Jun., 1989 | DE. |